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(No Model.) I 2 Sheets-Sheet 1.

A. LAPEYRE.

ADDING MAGHINE.

Patented Aug. 10, 1886.

(No Model.) 2 Sheets-Sheet 2.

A. LAPEYRE.

ADDING MACHINE. No. 346,927. Patented Aug. 10, 1886.

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UNITED STATES ANTOINE LAIEYRE,

PATENT OF PAPIS, FRANCE.

ADDiNG-MACi-HNE.

SPECIFICATION forming part of Letters Patent. No. 346,927, dated August10, 1886.

Application filed December 1885. Serial No. 184,834. (No model.)Patented ln France April 15, 1885, No. 168,202.

To aZZ whom, it may concern/.-

Be it known that I, Anromn LA'PEYRE, a citizen of the French Republic,residing at Paris, in said French Republic, have invented certain newand useful Improvements in Adding-Machines, (for which I have obtainedLetters Patent in France No. 168,202, under date of April 15, 1885;) andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of referencemarked thereon, which form a part of this specification.

This invention relates to that class of calculating-machines known asadding-machines, and has for its object to provide an apparatus ofsimple construction, whereby any desired number of sums may be speedilyand conveniently added.

The invention consists in the construction of the apparatus, and in thecombination of its parts, substantially as hereinafter described, andthen specifically pointed out in the claim. I

In the accompanying drawings, Figure l is a top plan view of my improvedadding-machine, and Fig. 2 is a longitudinal section of the machine,taken on the irregular line A B of Fig. 1; and Fig. 3 is a transversesection on the irregular lines 0 D of said Fig. 1, looking in thedirection of arrow 1.

My improved adding-machine is composed of asnitable rectangular board orframe, a, secured upon a board or table, I), provided withsupporting-legs 0. The frame a is pro vided with three cylindricalopenings for the reception of three disks or wheels, 6, f, and g,respectively, mounted loosely on pivot-pins e, f, and g, respectively.The pivotpin f of disk 1 and the pivot-pin g of disk 9 project somedistance above said disks, and terminate in a head, f and 9 that formsan abutment for one end of the coiled springs f and 9 the other ends ofwhich bear on their respective disks. The power of these springs isexerted to press the disks downward onto their seats f and g, whichconsist of any suitable flexible materialsnch as leather, cloth, felt,or analogous materiala like seat, 0, being pro vided [or the disk orwheel a, the pivot-pin whereof also terminates in a head, 0, thatsecures the pointer-handle Z in place and holds the disk or wheel to itsseat.

The object of providing the coiled springs and the flexible seats forthe disks above described is to prevent the disks or wheels fromrotating too freely in their operation, and thereby prevent them frombeing carried by momentum beyond the point to which they should move.

Of course it will be understood that instead of forming thecarrying-frame of two parts, a b, as described, it may be made of asingle piece, either of metal, wood, or other suitable material, andprovided with cylindrical recesses for the reception of the disks, asul'licicnt thickness of material being left at the bottom of eachrecess for the respective pivotpins of said disks or wheels.

The wheel 6 is the largest of the three, and is subdivided into onehundred equal spaces by means of metallic pins 72 projecting verticallyfrom the upper face of the said disk, the frame around the disk 0 havinga corresponding number of subdivisions arranged in series of tensubdivisions, indicated by proper numbers from 0 to 90, radial linesextending from the circle of subdivisions on the frame ito theconcentric circle of subdivisions on the: disk. For convenience ofnumbering the tenths of each section they are indicated by It 2 8 l,&c.; but in adding these will of course be read 11 12 13 ll, do, or 2122 23 2%, &c., as will be readily understood, the tens being numbered infull 10 20 30, &c.

On the pivot pin a of disk 6 is loosely mounted a springpointer orindex-handle, l, composed of a flexible strip of metal that has near itsouter end a slot, Z, and a hand-hold, Z", that projects vertically fromits upper face. To said wheel is also fiXBd a pointer-linger, p, that isalso slotted near its outer end, the slot 1) being so located as toenable the operator to see the numbers on the circle of subdivisions onframe (6 around disk 0.

The small wheel or disk f has ten subdivisions indicated by numbers, apin, 7;, projecting from each snbdivisional point into the path of thefinger p, and it is provided, like wheel 6, with a fixed finger, (1,that projects into the path of the pins 1' of the still smaller wheel ordisk 9, which is, like disk f, also subdivided.

into ten parts, and from each of the divisional points of which alsoprojects a pin, i, which pins lie in the path of the finger g on diskf.

R and R are zero-marks on the frame a, to which the corresponding markson disks fg are to be brought in commencing the operation of adding, ashereinafter explained.

A pin, 00, projects from the zero-mark R on frame a into the path ofalug, s, secured to disk 9. The object of providing the lug sis to lockthe disk 9 against further rotation when the sum of ten thousand hasbeen reached in the operation of adding. The arm q of disk f, projectingbetween the pins of disk 9, prevents said disk f from rotating, whilethe arm p of disk'e, projecting between the pins of disk f, preventssaid disk 6 from rotating, the three disks being thus locked againstrotation in a forward direction.

tis a tablet, of ivory, or bone, or slate, or

other suitable material, secured to frame a,

upon which the partial additions are noted.

The large disk 6 adds the units and tens to a hundred, the disk findicates the hundreds, and the disk 9 the thousands.

Before describing the operation of the apparatus I would state that twocolumns at a time are added,and that if there are three 001- umns,thaton the left is added separately. If there are four, two at a time areadded,and if there are five, two columns ata time are added, and theextreme left column of the five is added separately, &o. Of course ifthere are three, four, or five columns the large wheel, when adding thethird and fourth columns to the left, will add units and tens ofhundreds, &c., as will be readily understood. This being borne inmindthe operation of the apparatus may be briefly described, as follows:Supposing 35, 27, and 48 are to be added, the operator will bringlallthe disks to their zeromarks. This he effects by first moving the fingerp of disk e to the zero-mark on frame a, and by rotating the disksf andg in a direction the reverse of that in which they move in operation(which latter direction is indicated by arrows) until the zeros of bothdisks reach their respective zero-marks,R and R, on said frame.The'large disk 6 is next rotated by lifting the pointer-lever Zout ofcontact with the pins h of the disk and rotating the same until thefinger 1? stands at 85. To add the next number, 27, to the 35, the leverZ is then brought to the pin h, opposite, the zero-mark is brought intoengagement therewith,and the disk 6 is rotated until said lever standsat 27 when, to add the number 48, the lever is again disengaged from thepin and brought back to the zero-mark, and brought into engagement withthe pin opposite thereto and again rotated until it stands at 48. Duringthe first partial rotation of the disk e the finger 12 has been broughtto 35 by the second partial rotation to 62, and by the third par-, tialrotation said finger will pass over the edge or disk f,and, engaging pin7, will rotate the said disk the distance of one space, and will moveuntil it reaches ten,this being indicated by the large disk through theslot of finger p, and as the 100 is indicated by the smaller disk at thezero-mark the total of 110 is thus indicated.

From the above it will be readily understoodhow any number of figuresmay be added up to ten thousand. Each addition of two columns, whenthere are more than two, and when the amount of these two columns doesnot exceed ten thousand, is marked on the tablett. When the sum-totalexceeds ten thousand, the disks are locked against further rotation bythe lugs s and pin :0, as before described, and the parts are againbrought to their zero-marks and the operation resumed,

this being of course also the case after each addition of two columns.

Supposing it is desired to add several numbers composed of units, tens,and hundredsas, for instance, 15 7, 962, and 843the disksf g are rotatedto bring the zero-marks thereon opposite the zero-marks R R on theframe, while the disk 6 is rotated to bring the arm p opposite thezero-mark near the edge of said disk. The disk 6 is rotated by means ofthe lever Z engaging one of the pins h until the arm 1) stands opposite57. Lever Z is then disengaged from the pin, moved back to zero, whereit engages the pin opposite the zeromark, and the disk is rotated untilleverl comes opposite 62 on the frame, the arm 19 during this secondrotation of the disk striking one of the pins on disk f and causing saiddisk to rotate to bring pin numbered 1 opposite zero-mark B, said arm pstopping opposite .engages the pin at that point, and again rotates thedisk 6 until said lever arrives opposite the 43, the arm 1) thenstanding opposite number 62. This completes the operation of adding theunits and ten of the three numbers, which amounts to 162, as indicatedby disks 6 and f. To add the hundreds, the lever Z is moved backto'zero, engages the pin opposite the latter, and disk 0 is rotated onecomplete revolution corresponding to the 1 of the num her 157, the arm pduring this revolution striking against a pin on disk f, to rotate thesame one division-point farther,the pin 2 then standing opposite zero R.The lever l is then again brought to the zero-mark and disk 6 revolvednine times, corresponding to-the 9 of number 962, during each of whichrevolutions the disk IIS f will be rotated one division-point fartheruntil,during the ninth revolution of disk 6, the arm (1 will strike oneof the pins of disk 9 and rotate the same until pin 1 stands oppositezero R. The pin 1 on disk f will then "stand opposite zero R. The disk 6is again rotated eight times, corresponding with the 8 of number 843, atthe completion of which revolutions the pin 9 on disk f will standopposite zero R, the sum total of the three numbers being indicated asfollows:' The pin 1 on disk 9, standing opposite zero R, indicates onethousand; the pin 9 on disk f,standing opposite zero t, indicates ninehundred, and the arm p of.

on the pivot ofthe disk 6 and slotted at its outer 15 end, and thearms 1) q, secured, respectively, to disks 6f, with a stop for lockingthe disk 1 at the completion of each revolution of the latter againstfurther rotation, as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this21st day of September, 1885.

ANTOINE LAPEYRE.

XVit-nesses:

Boer. M. Hoornn, C. H. Louis, Sr.

